1 Corinthians 14:23-25

23If, therefore, the whole church assembles together and all are speaking in tongues and people who are outsiders or unbelievers come in, will they not say that you are out of your minds?

24But if all are prophesying and some unbeliever or outsider comes in, he is convicted by all and is called to account by all.

25The secrets of his heart will be revealed, and as a result he will fall facedown and worship God, proclaiming, “God is really among you.”